The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 17, 2009
Filed:
Feb. 22, 2007
Chang-li Liu, Taoyuan, TW;
Chang-Li Liu, Taoyuan, TW;
Delta Electronics, Inc., Taoyuan, TW;
Abstract
A keypad structure includes a circuit board, a reflecting plate, a second light guide plate, a second light guide plate, a shading strip, a first light guide plate, an elastic layer, a keypad module and a light source module. A shading strip is provided for attaching the second light guide plate to the first light guide plate. A hole at an overlapped position of the first and second light guide plates is provided for exposing the first light guide plate. A light emitting element of the second light guide plate is lit to project a single-color light onto a corresponding keypad. When the light emitting element of the first light guide plate is lit, different color lights are produced, such that a light transmission effect of single-color light or mixed multiple-color light occurs at the surface of the keypad corresponding to the first light guide plate.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile